Build a DNS server in CentOS

Build a DNS server in CentOS

DNS performs forward and reverse resolution...

Full Qualified Domain Name Security Qualified host Name = Host Name. For example, www.tar ena.com.cn

Execute the program:/usr/sbin/named service Script:/etc/init. d/named default port: TCP/UDP 53

Virtual root environment:/var/named/chroot/Master configuration file:/etc/named. conf region data file:/var/named/

DNS log/var/log/messages

1. Build primary DNS

[Root @ songchunhui ~] # Yum-y install bindbind-chroot caching-nameserver

[Root @ songchunhui ~] # Service named restart

[Root @ songchunhui ~] # Chkconfig named on

[Root @ songchunhui ~] # Cd/var/named/chroot/etc/

[Root @ songchunhui etc] # cp-p named. caching-nameserver.confnamed.conf

[Root @ songchunhui etc] # vim named. conf

Options {define Global options

Listen-on port 53 {192.168.3.100;}; listening address and port

Listen-on-v6 port 53 {: 1 ;};

Directory "/var/named"; default location of the address file (region data file)

Allow-transfer {192.168.3.11;}; Authorize the slave DNS Server

............

Allow-query {any;}; allows all clients to query

Allow-query-cache {any ;};

};

View localhost_resolver {

Match-clients {any ;};

Match-destinations {any ;};

[Root @ songchunhui etc] # vimnamed. rfc1912.zones

Zone "tarena.com" IN {positive interpretation region tarena.com is a domain name

Type master; type is the main interpretation Area

File "tarena.com. zone"; the data file of the main interpretation region address

};

Zone "3.168.192.in-addr. arpa" IN {sets the reverse resolution region.

Type master;

File "tarena.com. arpa ";

};

[Root @ songchunhui etc] # named-checkconf/var/named/chroot/etc/named. conf no error, no output

[Root @ songchunhui etc] # cd/var/named/chroot/var/named/region data address

[Root @ songchunhui named] # cp-p named.localtarena.com. zone

[Root @ songchunhui named] # vimtarena.com. zone

$ TTL 86400 effective Lifecycle

@ INSOA dns01.tarena.com.root.tarena.com .(

2014062501; Serial update No.

28800; Refresh

14400; Retry

3600000; Expire

86400); Minimum

INNS dns01.tarena.com. Domain Name Server NS

IN NSdns02.tarena.com.

INA 192.168.3.100

Dns01 INA 192.168.3.100

Dns02 INA 192.168.3.11

Www INA 192.168.3.100 round-robin DNS configuration, DNS load balancing

Www INA 192.168.3.11 round robin DNS configuration, DNS load balancing

Bbs INA 1.1.1.2

Ftp IN CNAMEwww alias record

* INA 192.168.3.100 * wildcard domain name resolution

$ GENERATE 20-50 station $ in a 192.168.3. $ allocate the corresponding DNS and Host Name

[Root @ songchunhui named] # cp -ptarena.com. zone tarena.com. arpa

[Root @ songchunhui named] # vimtarena.com. arpa

$ TTL 86400

@ INSOA dns01.tarena.com.root.tarena.com .(

2014062501; Serial

28800; Refresh

14400; Retry

3600000; Expire

86400); Minimum

INNS dns01.tarena.com.

INNS dns02.tarena.com.

100 INPTR dns01.tarena.com. pointer record RTP

100 INPTR dns02.tarena.com.

2 INPTR mail.tarena.com.

5 INPTR www.tarena.com.

[Root @ songchunhui named] # named-checkzonetarena.com tarena.com. zone region Address File Syntax is correct

Zone tarena.com/IN: loaded serial2014062501

OK

[Root @ songchunhui named] # named-checkzonetarena.com tarena.com. arpa

Zone tarena.com/IN: loaded serial2014062501

OK

Testing on the local machine

[Root @ songchunhui etc] # dig www.tarena.com@192.168.3.100

[Root @ songchunhui etc] # host www.tar ena. com192.168.3.100

2. Build slave DNS

[Root @ dengziqi ~] # Yum-y remove bindbind-chroot caching-nameserver

[Root @ dengziqi ~] # Service named restart

[Root @ dengziqi ~] # Chkconfig named on

[Root @ dengziqi ~] # Cd/var/named/chroot/etc/

[Root @ dengziqi etc] # cp-p named. caching-nameserver.confnamed.conf

[Root @ dengziqi etc] # vim named. conf

15 listen-on port 53 {192.168.3.11 ;};

27 allow-query {any ;};

28 allow-query-cache {any ;};

37 match-clients {any ;};

38 match-destinations {any ;};

[Root @ dengziqi etc] # vimnamed. rfc1912.zones

50 zone "tarena.com" IN {

51 type slave; Change Region type to slave

52 file "slaves/tarena.com. zone"; save it to the slaves/subdirectory.

53 masters {192.168.3.100 ;};

54 };

55 zone "3.168.192.in-addr. arpa" IN {

56 type slave;

57 file "slaves/tarena.com. arpa ";

58 masters {192.168.3.100 ;};

59 };

[Root @ dengziqi etc] # named-checkconfnamed.conf

[Root @ dengziqi etc] # service named restart

[Root @ dengziqi etc] # ls/var/named/chroot/var/named/slaves/

Tarena.com. arpa tarena.com. zone

Test

[Root @ dengziqi slaves] # host www.tar ena. com192.168.3.100

[Root @ dengziqi slaves] # hostdns02.tarena.com 192.168.3.100

[Root @ dengziqi slaves] # dig www.tar ena. com192.168.3.100

Client DNS settings

Vim/etc/resolv. conf

Nameserver 192.168.3.100

Nameserver 192.168.3.11